21.   It blames practices in which laboratory workers culled pituitary glands, the source of hGH, from infected cadavers in hospital mortuaries.

n. + worker >>共 532
aid 15.33%
rescue 12.07%
construction 5.03%
relief 4.35%
office 2.75%
government 2.71%
health 2.69%
factory 2.39%
farm 2.03%
oil 1.66%
laboratory 0.11%
laboratory + n. >>共 317
test 17.12%
animal 6.79%
experiment 5.35%
study 5.17%
mouse 3.18%
analysis 2.88%
work 2.58%
technician 2.46%
rat 2.34%
equipment 2.28%
worker 1.26%
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